#include <iostream>
using namespace std;

class Person {
public:

	string _name="666666";
};

class Student : virtual public Person {
public:
	
	int _age=18;
};

class Teacher : virtual public Person {
public:

	int _id=7;
};

class Assistant : public Student,public Teacher {
public:

	int _gender=1;
};

class A {
public:
	int _a = 1;
};
class B :virtual public A{
public:
	int _b = 2;
	int _bb = 3;
};
int main() {
	A a;
	B b;
	return 0;
}